\begin{tikzpicture}
    \begin{scope}
        \tkzDefPoints{0/0/B, 2.5/0/C}
        \tkzDefPoint(50:2.5){A}
        \tkzDefPoint(25:2.5){D}

        \tkzDrawSegments(B,A  B,C  B,D)
        \tkzMarkAngles[size=0.6](C,B,D)
        \tkzLabelAngle[pos=0.9](C,B,D){$1$}
        \tkzLabelPoints[below](B,C)
        \tkzLabelPoints[right](A,D)
    \end{scope}

    \begin{scope}[xshift=3.2cm]
        \tkzDefPoints{0/0/B', 2.5/0/C'}
        \tkzDefPoint(50:2.5){A'}
        \tkzDefPoint(25:2.5){D'}

        \tkzDrawSegments(B',A'  B',C'  B',D')
        \tkzMarkAngles[size=0.6](C',B',D')
        \tkzLabelAngle[pos=0.9](C',B',D'){$2$}
        \tkzLabelPoints[below](B',C')
        \tkzLabelPoints[right](A',D')
    \end{scope}
\end{tikzpicture}

